We all know Hideo Kojima is a big fan of Twitter. He’s always tweeting about his food, his favorite movies, and of course teasing us about his latest Metal Gear related projects.

No one could predict that Kojima and Konami would create a Twitter app, though. It’s called Metal Gear TW, and it allows you to be a bit sneaky with your tweets. Using your current Twitter account you can sign into the app and use the camouflage mode to censor parts of your tweet so only select people can read and see the full text. It’s the high tech version of those invisible ink pens you used to have as a kid.

If you want to be really sneaky you can turn on stealth mode, which stops certain Twitter users from seeing your feed at all. It’s essentially a way of blocking people but without them knowing. Images from their Tokyo Game Show presentation shows how camouflage works (see the image above). The censored words on the tweet appear as two black circles to anyone who doesn’t have authority to read it.

Metal Gear TW will be out on iOS by the end of this year, but there’s no word yet on if there will be an Android version yet. Metal Gear TW would be quite a good way to send secret messages to your friends without having to use the direct message function of Twitter, although it could just end up being an annoying gimmick for teasing your followers.